绿色法制备多孔球状镧铁复合物及其吸附磷性能研究

doi:10.19964/j.issn.1006-4990.2021-0633

Abstract

Abstract:

Porous spherical lanthanum-iron complexes（LFA-C） were prepared by hydrothermal and alkaline etching methods.The composite was characterized and analyzed by scanning electron microscopy（SEM），fourier transform infrared spectroscopy（FTIR），X-ray diffraction（XRD），specific surface and microporous physical adsorption instrument.And its adsorption properties of phosphate as adsorbent was investigated.The results showed that the surface of porous lanthanum-iron complexes was rough and porous.The alkali etching process promoted the formation of La（OH）₃ on the surface of LAF-C.At the same time，the increase of the specific surface area of LAF-C was conducive to obtain more adsorption active sites.The study of adsorption kinetics showed that the adsorption process of LAF-C conformed to the quasi second-order kinetic model.The saturated adsorption capacity was 159.08 mg/g.Under the condition of coexisting ions，LAF-C had strong anti-interference ability to adsorb phosphate.At the same time，LAF-C showed good cyclic performance through adsorption-desorption process.As an environmental functional material with high efficiency in dephosphorization and eutrophication inhibition，LFA-C had broad application prospects.

Key words: lanthanum-iron complexes, adsorption, phosphate

CLC Number:

TQ424

JIANG Debin,LÜ Qianfeng,XIANG Meiling,ZENG Xingyu,ZHANG Yuxin,FENG Li. Study on preparation of porous spherical lanthanum-iron complex by green method and its phosphate adsorption performance[J]. Inorganic Chemicals Industry, 2022, 54(7): 85-90.

Figures/Tables 11

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C₀/ （mg?L^-1）	q_e，exp/ （mg?g^-1）	准一级动力学模型				准二级动力学模型
C₀/ （mg?L^-1）	q_e，exp/ （mg?g^-1）	q_e，cal/ （mg?g^-1）	k_f/ min^-1	R²		q_e，cal/ （mg?g^-1）	k_s/ （10^-3g?mg^-1?min^-1）	R²
5	24.85	24.76	-2.899 1	0.999	25.00		0.665 2	0.999
20	86.05	82.04	-1.016 6	0.964	86.70		0.021 4	0.995
40	114.50	106.66	-0.778 1	0.989	112.90		0.012 1	0.999

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Study on preparation of porous spherical lanthanum-iron complex by green method and its phosphate adsorption performance

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